Can someone me out with this i will mark brainliest

The answer is B have a nice day

Answer will be C: Decreases because the number of prey decreases.

 It can't be A because the number of predators (alligators) stay the same. It can't be B because again, the number of predators stays the same, and even if they increased, the number of frogs wouldn't increase as well, and it can't be D, because the number wouldn't increase of the prey went down.

Hope this helps.

$100. 125 x 0.20 = 25125 - 25 = $100

C. gemstones they are the only non metallic mineral from the list.